中国激光, 2014, 41 (8): 0805004, 网络出版: 2014-06-24
放大自发辐射光源结合相关法实现无源光网络故障检测
Link Fault Detection in Passive Optical Networks Based on Correlation Method Combined with an Amplified Spontaneous Emission Source
光通信 故障定位 相关法 波分复用无源光网络 放大自发辐射源 optical communications fault location correlation wavelength division multiplexing passive optical n amplified spontaneous emission
摘要
提出了一种基于掺铒光纤放大自发辐射(ASE)光源实现波分复用无源光网络(WDM-PON)故障检测的技术。WDM-PON因其具有节点密、支路多的结构特点导致光纤链路中故障检测困难,该技术利用双程后向结构掺铒光纤ASE光源光谱的宽带特性和具有delta相关特性的时域输出,结合相关法实现分辨率为厘米量级的WDM-PON光纤链路故障点定位。以8通道WDM-PON为例进行检测,结果表明该方法能够精确定位光网络中断点及松动接头的位置,并实现多故障反射事件检测。实验中获得动态范围为23 dB,分辨率达到4 cm,测量精度与测量距离无关。基于ASE光源的宽带特性,该技术至少可完成对32路的WDM-PON故障检测。
Abstract
The fault detection technique for the wavelength division multiplexing passive optical network (WDM-PON) is proposed based on an erbium-doped fiber amplified spontaneons emission (ASE) source. It is quite difficult to the link fault detection because of the multi-branch and node density structure of WDM-PON. The technology utilizes the broadband characteristics of the erbium-doped fiber ASE source with the double-pass backward configuration and the delta correlation properties of the time-domain output. It can solve the problem in the WDM-PON fault detection of fiber links. In the experiments, the detection of 8 channels WDM-PON can accurately locate the fiber breakpoint, the joint looseness, and multi-fault reflection. The results show that the 23 dB dynamic range and 4 cm spatial resolution which is independent to the measuring distance are realized. The technology is able to achieve the detection of the WDM-PON faults with 32 channels based on the broadband characteristics of the ASE source to realize WDM-PON fiber link fault location with centimeter resolution.
刘艳阳, 杨玲珍, 王斐斐, 陈曦, 张朝霞, 王娟芬, 刘香莲. 放大自发辐射光源结合相关法实现无源光网络故障检测[J]. 中国激光, 2014, 41(8): 0805004. Liu Yanyang, Yang Lingzhen, Wang Feifei, Chen Xi, Zhang Zhaoxia, Wang Juanfen, Liu Xianglian. Link Fault Detection in Passive Optical Networks Based on Correlation Method Combined with an Amplified Spontaneous Emission Source[J]. Chinese Journal of Lasers, 2014, 41(8): 0805004.